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RVaholic

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  1. FIRST THING. Go into your Magnum Setup and turn OFF or Disable SEARCH WATTS. In the SHORE setup, turn down the amp setting to 15. That is what Magnum says….and if that doesn’t work….try 10 or even 5. This is a nuance issue and common and Magnum does NOT recommend a 15 of 20 Amp GFCI connection and says that all could be good, but a ghost will be there. You can run an experiment. Go to the shop. Make the two changes above to your inverter. Then try it. No joy? Have a good heavy duty extension….and plug it into an inside, NON GFCI. BINGO…if it works….then there is a ghost in your system….read the entire post below…. Search Watts disabled. Shore amp set to 5. Everything works when not plugged in to a GFCI. No change IF you leave on the Refrigerator and it has an icemaker, in USE….it can trip out a GFCI. Your home refrigerator is on a dedicated NON GFCI circuit. The small heater in any icemaker can develop a MINOR leak and the GFCI will trip. The icemaker should always be turned off when on 115 VAC with a GFCI. BTW…if your onboard Refrigerator is plugged into a circuit, as MANY ARE, on the MH that has a GFCI, then you should replace that 20 A GFCI with a new one as they get old and crotchety and will trip for no good reason. Eaton Wiring Devices and Leviton are the brands recommended by Magnum for compatibility with their Inverters. Unplugged fridge. No change. Next up. There is a line or appliance in use that has an unbalanced load in that the “parameters” are outside the circuitry limits…it will trip. Read this…. https://www.fluke.com/en-us/learn/blog/grounding/chasing-ghost-trips-in-gfci-protected-circuits OK…there may be a pop quiz? LOL….translation….you have to start unplugging every 110 device or appliance…..ONE BY ONE….to isolate it. There is NO, to the best of my knowledge and background, anyway to run a circuit test. The trouble shooting technique used by electricians is either TOTALLY pull every item loose….or start to disconnect. If it were mine….start with it the easy way. Turn OFF the 50 amp main breaker in the electrical panel. Then see. IF it still does it then you have a loose connection somewhere in between the 15 amp to 30 amp to 50 amp connectors….running all the way to the ATS. With the main panel OFF….I THINK that a loose connection in the panel, would not trip it. But…..look at the name of the ARTICLE. GHOSTS. Turned off 50a breaker, no change. Unplugged all appliances and chargers, no change. Tightened all connections in the breaker panel. No change OK….the GFCI holds….NO TRIP. THEN disconnect the 115 plug. TURN OFF ALL the breakers…. Now turn on the Inverter 30 amp. Turn on the 50 Main breaker. Then plug it in. If it trips….then you have to really start digging….and it could be tedious. Then if it is OK, turn OFF the Main and turn on another breaker…..then plug in. You have to isolate it. Turned off all breakers, no change. OK….IF the first test, the MAIN OFF Tripped it. Then do a complete PM of the ATS. As in….with POWER OFF and the GENNY Breaker (on the Genny) OFF, tighten every connection on the ATS. Then repeat. NO JOY….then you may have a loose connection from the shore power cord to the Junction Box that goes to the Romex that is feeding the ATS. If not there, then it may be in the cord or the plug or the adapters. In other words, there is NO HARD TEST or measurement. A tiny leak will be tough for an electronics tech to find. Tightened ATS, no change. Generator breaker off, no change. Checked connections at junction box, no issues. Changed 50a plug (old one was molded. Could not take apart). No change. Checked adapters. No issues. Disconnected main cord at surge protector. Checked cord for continuity leaks between terminals. No issues found If it happens when the Inverter is brought on or the 30 Amp breaker….same issue. You would need to unplug every 115 VAC ITEM. Refrigerator, TV, phone charger, microwave, HE device, etc. if no JOY…then pull the cover off the Inverter and tighten the incoming and outgoing lines and the ground. You ALSO would be WISE to do a PM on your main panel….and tighten every screw in it. If it STILL a exists, odds are there is a problem with an outlet….and finding that is tough….very tough….as you need some really experienced RV Tech…. Tightened connections at inverter. No change. Tightened screws in main panel. No change.
  2. 30 amp at home doesn't have GFI. This is a new problem as we have been at this storage site for 2 years. No work done on the transfer switch. No work on the generator since lase service. I check for ohms resistance between the feed, neutral and ground. Feed to ground shows no connectivity (short). Neutral to ground shows dead short (zero resistance). The appliances, I unplugged one at a time, then plugged the rv in to a GFI and it still tripped the circuit. The outlets I checked that they were not damaged or had anything plugged in. The breaker box, I disconnected each circuit individually and repeated the rv plug in and GFI trip.
  3. Tom, Will check out the guidance given. Thank you for the info. Mitch
  4. It's happening at the storage as well as the shop she is at now.
  5. Good afternoon everyone. I have a 2007 Beaver Marquis that trips our GFI electrical in storage but has no issues plugging into 30amp at home. Needing a direction to go to. The short is on the neutral side. Here is what I have checked and all passed. Electrical umbilical cable, cord real, surge protector (Model 40250), breaker box 1 and 2, Inverter (Model MS2812), Onan generator 12000, Microwave (Advantiom 120), Fridge (Maytag model JCD2292KTB, Washer and dryer (Maytag), kitchen outlets, bedroom outlets, sitting area outlets, main tv outlet, and outlets in the baggage compartments. Any suggestions would be great. Mitch.
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